We're dividing 81581530 by 140 
The aim is to understand the frequency of 140 in 81581530.

Step 1:
140 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 140

Let's proceed to step 2:
81 divided by 140 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (5) from the dividend after 81, then repeat: 815 / 140

Step 3:
815 divided by 140 is 5 with a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 700 from 815 leaves us with 115.
Include the next digit (8) from the dividend after 115, then repeat: 1158 / 140

Advancing to step 4:
When dividing 1158 by 140, we get 8 with a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 58.0
Subtracting 1120 from 1158 leaves us with 38.
Include the next digit (1) from the dividend after 38, then repeat: 381 / 140

Step 5:
If we divide 381 by 140, we get 2 and a remainder of 101.
The next digit of our result is 2. 
Result so far: 582.0
Subtracting 280 from 381 leaves us with 101.
Grab the next digit (5) from the dividend, add it to 101, then carry on: 1015 / 140

Let's proceed to step 6:
140 goes into 1015 7 times with a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 5827.0
Subtract 980 from 1015 to get 35.
Append the next digit (3) from the dividend to 35 and continue with: 353 / 140

On to step 7:
140 can be fit into 353 2 times, resulting in a remainder of 73.
Use 2 as the next digit of our solution. 
Result so far: 58272.0
If we subtract 280 from 353, we get 73.
Grab the next digit (0) from the dividend, add it to 73, then carry on: 730 / 140

On to step 8:
If we divide 730 by 140, we get 5 and a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 582725.0
If we subtract 700 from 730, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
140 goes into 300 2 times with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 582725.2
If we subtract 280 from 300, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
200 divided by 140 is 1 with a remainder of 60.
Record the quotient 1 as the next digit in the result. 
Result so far: 582725.21
If we take 140 away from 200, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 11:
600 divided by 140 is 4 with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 582725.214
If we subtract 560 from 600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
400 divided by 140 is 2 with a remainder of 120.
Put 2 as the next digit of the answer. 
Result so far: 582725.2142
If we subtract 280 from 400, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 13:
1200 divided by 140 is 8 with a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 582725.21428
If we subtract 1120 from 1200, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 14:
If we divide 800 by 140, we get 5 and a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 582725.214285
Deduct 700 from 800 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 15:
The number 140 fits into 1000 7 times, leaving a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 582725.2142857
Deduct 980 from 1000 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 16:
200 divided by 140 is 1 with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 582725.21428571
If we subtract 140 from 200, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 582725.21428571 with a remaining 6e-08.